Quoted from Dr_Gonzo:5 ball, wtf? Did you ever get 5 balls at the local arcade?
All the pins were 5 balls for .25 at the arcades up till about the early to mid 90's, then they started playing with pricing... 5 balls for .50 then 3 balls .50 and so on.... All my machines are set to 5 ball. That's what they were in the arcades they came from. Of course I have no machines newer than 91'